Abstract
Introduction
The immune response is controlled by several inhibitory mechanisms. These mechanisms include regulatory T cells, which exist in multiple classes. Notable among these are Foxp3-expressing regulatory T cells (Treg), NKT cells, and Tr1 cells. Common to these mechanisms are inhibitory cytokines such as interleukin-10 and transforming growth factor-beta (TGF-β). TGF-β and Foxp3-expressing Treg cells are critical in maintaining self-tolerance and immune homeostasis.
Discussions
The immune suppressive functions of TGF-β and Treg cells are widely acknowledged and extensively studied. Nonetheless, recent studies revealed the positive roles for TGF-β and Treg cells in shaping the immune system and the inflammatory responses. In this paper, we will discuss the role of these mechanisms in the control of immunity and autoimmunity and the mechanisms that underlie how these molecules control these responses.
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References
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Acknowledgments
We thank F. Manzo for secretarial assistance. Y.Y.W. is a Cancer Research Institute (CRI) fellow. R.A.F. is an investigator of the Howard Hughes Medical Institute. Work from this laboratory quoted in this review is supported by grants from the NIH and American Diabetes Association (ADA).